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Cycling, athlete, performance

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https://www.readbyqxmd.com/read/27904629/effect-of-various-kinds-of-beverages-on-stress-oxidative-f2-isoprostane-serum-lipid-and-blood-glucose-of-elite-taekwondo-players
#1
Zahra Maghsoudi, Ashfin Shiranian, Gholamreza Askai, Reza Ghaisvand
BACKGROUND: Athletes' recovery is important in improving their performance. Nutritional strategies can be effective in enhancing recovery rate. Choosing the best food items in appropriate intervals can play effective roles in resynthesis of fuels and recovery of muscle injury. Beverage micro and macronutrient content are helpful in fuel restoration. In this study, we assess the effects of various kinds of beverages on oxidative stress, muscle injury, and metabolic risk factors in taekwondo players...
September 2016: Iranian Journal of Nursing and Midwifery Research
https://www.readbyqxmd.com/read/27857844/analysis-of-the-pushing-phase-in-paralympic-cross-country-sit-skiers-class-lw10
#2
Laura Gastaldi, Stefano Mauro, Stefano Pastorelli
Paralympic Cross-Country sit-skiers use adaptive equipment, with a resulting gesture similar to double poling techniques adopted by able-bodied skiers. Despite the similarity, a specific attention on the gesture performed by sit-skiers is needed. The paper focuses on the sledge kinematic and on inertia effect of upper body motion which is translated in a propulsive effect in the early stage of the pushing cycle. In particular a group of 7 elite sit skiers of class LW10 were recorded with a video-based markerless motion capture technique during 1 km sprint Paralympic race...
November 2016: Journal of Advanced Research
https://www.readbyqxmd.com/read/27834554/subjective-fatigue-and-readiness-to-train-may-predict-functional-overreaching-after-only-3-days-of-cycling
#3
Twan Ten Haaf, Selma van Staveren, Erik Oudenhoven, Maria F Piacentini, Romain Meeusen, Bart Roelands, Leo Koenderman, Hein A M Daanen, Carl Foster, Jos J de Koning
PURPOSE: The aim of this study was to investigate whether monitoring of easily measurable stressors and symptoms can be used to early distinguish between acute fatigue (AF) and functional overreaching (FOR). METHODS: The study included 30 subjects (11 female/ 19 male, age: 40.8±10.8 y, VO2max: 51.8±6.3 ml/kg/min) who participated in an 8-day cycling event over 1,300 km with 18,500 climbing meters. Performance was measured before and after the event using a maximal incremental test...
November 11, 2016: International Journal of Sports Physiology and Performance
https://www.readbyqxmd.com/read/27817192/positive-pacing-in-elite-ironman-triathletes
#4
Nicole Angehrn, Christoph A. Rüst, Pantelis T. Nikolaidis, Thomas Rosemann, Beat Knechtle
Pacing is known to influence athletic performance. For the Ironman triathlon program, a positive pacing strategy, i.e., the continuous decrease of speed over time was recommended. By analyzing split times, we assessed the pacing strategies of the top 100 finishers of the cycling part of 13 Ironman races and of the running part of 11 Ironman races taking place in 2014. Furthermore, sex-associated differences in performance and pacing strategies were calculated. We analyzed 7,687 cycling and 11,894 running split times of 1,392 triathletes (1,263 men, 129 women)...
December 31, 2016: Chinese Journal of Physiology
https://www.readbyqxmd.com/read/27813046/the-association-between-mct1-t1470a-polymorphism-and-power-oriented-athletic-performance
#5
N Kikuchi, N Fuku, R Matsumoto, S Matsumoto, H Murakami, M Miyachi, K Nakazato
The purpose of this study was to investigate the effects of the MCT1 T1470A polymorphism (rs1049434) on power-oriented performance and lactate concentration during or after cycling sprints in Japanese wrestlers. Participants (199 wrestlers and 649 controls) were genotyped for the MCT1 T1470A genotype (rs1049434) using the TaqMan(®) Assay. All wrestlers were international (n=77) or national (n=122) level athletes. Among them, 46 wrestlers performed 2 anaerobic performance tests, a 30-s Wingate Anaerobic test (WAnT) and a series of 10 maximal effort 10-s sprints on a cycle ergometer...
November 3, 2016: International Journal of Sports Medicine
https://www.readbyqxmd.com/read/27798029/stress-fracture-and-premenstrual-syndrome-in-japanese-adolescent-athletes-a-cross-sectional-study
#6
Takashi Takeda, Yoko Imoto, Hiroyo Nagasawa, Atsuko Takeshita, Masami Shiina
OBJECTIVES: To investigate the relationship between the occurrence of stress fracture and premenstrual syndrome (PMS)/premenstrual dysphoric disorder (PMDD) in Japanese adolescent athletes. DESIGN: Cross-sectional study. SETTING: Osaka, Japan. PARTICIPANTS: A school-based survey on menstruation and school life was conducted using a sample of 1818 Japanese female students who belonged to two public high schools in Japan...
October 18, 2016: BMJ Open
https://www.readbyqxmd.com/read/27791976/foot-and-ankle-kinematics-and-dynamic-electromyography-quantitative-analysis-of-recovery-from-peroneal-neuropathy-in-a-professional-football-player
#7
Nikhil K Prasad, Krista A Coleman Wood, Robert J Spinner, Kenton R Kaufman
The assessment of neuromuscular recovery after peripheral nerve surgery has typically been a subjective physical examination. The purpose of this report was to assess the value of gait analysis in documenting recovery quantitatively. A professional football player underwent gait analysis before and after surgery for a peroneal intraneural ganglion cyst causing a left-sided foot drop. Surface electromyography (SEMG) recording from surface electrodes and motion parameter acquisition from a computerized motion capture system consisting of 10 infrared cameras were performed simultaneously...
2016: Journal of Surgical Orthopaedic Advances
https://www.readbyqxmd.com/read/27779439/comparison-of-ergometer-and-track-based-testing-in-junior-track-sprint-cyclists-implications-for-talent-identification-and-development
#8
Paul J Tofari, Stuart J Cormack, Tammie R Ebert, A Scott Gardner, Justin G Kemp
Talent identification (TID) and talent development (TDE) programmes in track sprint cycling use ergometer- and track-based tests to select junior athletes and assess their development. The purpose of this study was to assess which tests are best at monitoring TID and TDE. Ten male participants (16.2 ± 1.1 year; 178.5 ± 6.0 cm and 73.6 ± 7.6 kg) were selected into the national TID squad based on initial testing. These tests consisted of two 6-s maximal sprints on a custom-built ergometer and 4 maximal track-based tests (2 rolling and 2 standing starts) using 2 gear ratios...
October 25, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27771799/salbutamol-effects-on-systemic-potassium-dynamics-during-and-following-intense-continuous-and-intermittent-exercise
#9
Muath M Altarawneh, Aaron Petersen, Robert Smith, David M Rouffet, Francois Billaut, Ben D Perry, Victoria L Wyckelsma, Antony Tobin, Michael J McKenna
PURPOSE: Salbutamol inhalation is permissible by WADA in athletic competition for asthma management and affects potassium regulation, which is vital for muscle function. Salbutamol effects on arterial potassium concentration ([K(+)]a) during and after high-intensity continuous exercise (HIcont) and intermittent exercise comprising repeated, brief sprints (HIint), and on performance during HIint are unknown and were investigated. METHODS: Seven recreationally active men participated in a double-blind, randomised, cross-over design, inhaling 1000 µg salbutamol or placebo...
October 22, 2016: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/27754419/time-of-day-and-training-status-both-impact-the-efficacy-of-caffeine-for-short-duration-cycling-performance
#10
James C Boyett, Gabrielle E W Giersch, Christopher J Womack, Michael J Saunders, Christine A Hughey, Hannah M Daley, Nicholas D Luden
This project was designed to assess the effects of time of day and training status on the benefits of caffeine supplementation for cycling performance. Twenty male subjects (Age, 25 years; Peak oxygen consumption, 57 mL·kg(-1)·min(-1)) were divided into tertiles based on training levels, with top and bottom tertiles designated as 'trained' (n = 7) and 'untrained' (n = 7). Subjects completed two familiarization trials and four experimental trials consisting of a computer-simulated 3-km cycling time trial (TT)...
October 14, 2016: Nutrients
https://www.readbyqxmd.com/read/27747789/hyperoxia-extends-time-to-exhaustion-during-high-intensity-intermittent-exercise-a-randomized-crossover-study-in-male-cyclists
#11
Toshiyuki Ohya, Ryo Yamanaka, Hayato Ohnuma, Masahiro Hagiwara, Yasuhiro Suzuki
BACKGROUND: Some endurance athletes exhibit exercise-induced arterial hypoxemia during high-intensity exercise. Inhalation of hyperoxic gas during exercise has been shown to counteract this exercise-associated reduction in hemoglobin oxygen saturation (SaO2), but the effects of hyperoxic gas inhalation on performance and SaO2 during high-intensity intermittent exercise remain unclear. This study investigated the effects of hyperoxic gas inhalation on performance and SaO2 during high-intensity intermittent cycling exercise...
December 2016: Sports Medicine—Open
https://www.readbyqxmd.com/read/27719106/the-influence-of-cycling-intensity-upon-cognitive-response-during-inferred-practice-and-competition-conditions
#12
Michael J Duncan, Neil D Clarke, Martin Cox, Mike Smith
In many sport and exercise situations, cognitive performance is required under conditions of high physiological load and high cognitive anxiety. However, few studies have assessed all these components in situ. The current study sought to address this issue. Fourteen adults (9 males, 5 females) completed 2 incremental exercise trials (perceived competition or perceived practice) in a counterbalanced order. Cognitive performance, via a test of visual discrimination, rating of perceived exertion (RPE), heart rate (HR), blood lactate (Bla), and anxiety scores, was recorded at rest, 70% [Formula: see text] and 90% [Formula: see text]...
October 8, 2016: Journal of Sports Sciences
https://www.readbyqxmd.com/read/27713701/improvements-in-cycling-time-trial-performance-are-not-sustained-following-the-acute-provision-of-challenging-and-deceptive-feedback
#13
Hollie S Jones, Emily L Williams, David Marchant, S Andy Sparks, Craig A Bridge, Adrian W Midgley, Lars R Mc Naughton
The provision of performance-related feedback during exercise is acknowledged as an influential external cue used to inform pacing decisions. The provision of this feedback in a challenging or deceptive context allows research to explore how feedback can be used to improve performance and influence perceptual responses. However, the effects of deception on both acute and residual responses have yet to be explored, despite potential application for performance enhancement. Therefore, this study investigated the effects of challenging and deceptive feedback on perceptual responses and performance in self-paced cycling time trials (TT) and explored whether changes in performance are sustained in a subsequent TT following the disclosure of the deception...
2016: Frontiers in Physiology
https://www.readbyqxmd.com/read/27712198/performance-and-physiological-effects-of-different-descending-strategies-for-cross-country-mountain-biking
#14
Matthew C Miller, Paul W Macdermid, Phil W Fink, Stephen R Stannard
This study investigated the performance-related feasibility and physiological benefits of purposefully eliminating propulsive work while descending in mountain biking and compared values to those measured during road descending. Participants cycled uphill on a road at race pace before descending over three conditions (off-road pedalling; off-road coasting; road coasting). Relatively low power output during off-road pedalling was associated with a greater oxygen uptake (p < .01) when compared with off-road coasting despite no difference in vibration exposure (p > ...
October 6, 2016: European Journal of Sport Science
https://www.readbyqxmd.com/read/27710146/high-prevalence-of-dehydration-and-inadequate-nutritional-knowledge-among-university-and-club-level-athletes
#15
Pamela J Magee, Alison M Gallagher, Jacqueline M McCormack
Although dehydration of ≥2% body weight (BW) loss significantly impairs endurance performance, dehydration remains prevalent among athletes and may be owing to a lack of knowledge in relation to fluid requirements. The aim of this study was to assess the hydration status of university/club level athletes (n=430) from a range of sports/activities (army officer cadet training; bootcamp training; cycling; Gaelic Athletic Association camogie, football and hurling; golf; hockey; netball; rugby; running (sprinting and endurance); Shotokan karate and soccer) immediately before and after training/competition and to assess their nutritional knowledge...
October 6, 2016: International Journal of Sport Nutrition and Exercise Metabolism
https://www.readbyqxmd.com/read/27703854/sex-differences-in-pacing-during-ultraman-hawaii
#16
Beat Knechtle, Pantelis T Nikolaidis
BACKGROUND: To date, little is known for pacing in ultra-endurance athletes competing in a non-stop event and in a multi-stage event, and especially, about pacing in a multi-stage event with different disciplines during the stages. Therefore, the aim of the present study was to examine the effect of age, sex and calendar year on triathlon performance and variation of performance by events (i.e., swimming, cycling 1, cycling 2 and running) in 'Ultraman Hawaii' held between 1983 and 2015...
2016: PeerJ
https://www.readbyqxmd.com/read/27686403/influence-of-a-caffeine-mouth-rinse-on-sprint-cycling-following-glycogen-depletion
#17
Joseph Kizzi, Alvin Sum, Fraser E Houston, Lawrence D Hayes
Attenuated performance during intense exercise with limited endogenous carbohydrate (CHO) is well documented. Therefore, this study examined whether caffeine (CAF) mouth rinsing would augment performance during repeated sprint cycling in participants with reduced endogenous CHO. Eight recreationally active males (aged 23 ± 2 yr, body mass 84 ± 4 kg, stature 178 ± 7 cm) participated in this randomized, single-blind, repeated-measures crossover investigation. Following familiarization, participants attended two separate evening glycogen depletion sessions...
November 2016: European Journal of Sport Science
https://www.readbyqxmd.com/read/27677364/contribution-of-branched-chain-amino-acids-to-purine-nucleotide-cycle-a-pilot-study
#18
F-C Tang, C-C Chan
BACKGROUND/OBJECTIVES: Branched-chain amino acids (BCAAs) and purine nucleotide cycle (PNC) are both associated with energy metabolism. The purpose of this study was to explore the influences of BCAA supplementation on the PNC activity of male athletes in response to a bout of endurance running exercise. SUBJECTS/METHODS: Twelve male athletes (20.3±1.4 years) participated in the study. Each of the athletes received 12 g of a BCAA supplement (leucine 54%, isoleucine 19% and valine 27%) per day during the study...
September 28, 2016: European Journal of Clinical Nutrition
https://www.readbyqxmd.com/read/27669183/effects-of-inertial-setting-on-power-force-work-and-eccentric-overload-during-flywheel-resistance-exercise-in-women-and-men
#19
Luis Manuel Martinez-Aranda, Rodrigo Fernandez-Gonzalo
Exercise load is a key component in determining end-point adaptations to resistance exercise. Yet, there is no information regarding the use of different inertia (i.e. loads) during iso-inertial flywheel resistance exercise, a very popular high-intensity training model. Thus, this study examined power, work, force and eccentric-overload produced during flywheel resistance exercise with different inertial settings in men and women. Twenty-two women (n=11) and men (n=11) performed unilateral (in both legs) isolated concentric (CON) and coupled CON and eccentric (ECC) exercise in a flywheel knee extension device employing six inertias (0...
September 16, 2016: Journal of Strength and Conditioning Research
https://www.readbyqxmd.com/read/27647157/chronic-adaptations-to-eccentric-training-a-systematic-review
#20
Jamie Douglas, Simon Pearson, Angus Ross, Mike McGuigan
BACKGROUND: Resistance training is an integral component of physical preparation for athletes. A growing body of evidence indicates that eccentric strength training methods induce novel stimuli for neuromuscular adaptations. OBJECTIVE: The purpose of this systematic review was to determine the effects of eccentric training in comparison to concentric-only or traditional (i.e. constrained by concentric strength) resistance training. METHODS: Searches were performed using the electronic databases MEDLINE via EBSCO, PubMed and SPORTDiscus via EBSCO...
September 19, 2016: Sports Medicine
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